- sometimes 2cm Flak fitted instead 15 cm Panzerwerfer 42 auf Selbstfahrlafette schwerer Wehrmachtsschlepper mit Behelfspanzerung - at least two built by Martini-Hütte in Salzkotten Notes References Chamberlain, Peter, and Hilary L. Doyle. Thomas L. Jentz (Technical Editor). Encyclopedia of German Tanks of World War Two: A Complete Illustrated Directory of German Battle Tanks, Armoured Cars, Self-propelled Guns, and Semi-tracked Vehicles, 1933–1945, London: Arms and Armour Press, 1978 (revised edition 1993). Spielberger, Walter J. Halftracked Vehicles of the German Army 1909-1945, Atlgen, PA: Schiffer, 2008 External links sWS on wwiivehicles.com all known sWS info World War II armoured fighting vehicles of Germany World War II half-tracks Artillery tractors Half-tracks of Germany Military vehicles introduced from 1940 to 1944